I have done a 300 mile ride 10 times and enjoy doing century rides whenever I can. I've done more than 100 miles in a day several times. I plan a training program that will be 400-500 miles/week in preparation.OK, I realize mine wasn't an exact answer to your original question but you didn't exactly answer mine either.
Were those 300 mile rides all in one day or over several days? Were those centuries isolated rides or did you do a series of them on consecutive days? Were any of them on a bike burdened with a touring load?
For example, I've done twenty 350 - 500 mile rides but they took 5 days to a week each. I've ridden 75 centuries but they were, at the most, two centuries on two consecutive days. Given all of that, I still wouldn't plan on 30 centuries in a row on a loaded bike.
I'm not "attacking" your plans but I am asking you to realize the implications of what you are asking.